Sand-pump.



I'. L. CASPER.

SAND PUMP.

APPLIUATION FILED JULY 1s, 1910. 4 1,003,874. Patented Sept. 19,1911.-

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SAND PUMP.

LPPLIoATIoN FILED JULY 1e, 1910.

Patented Sept. 19,1911.

2 SHEETS-SHEET 2.

FRANK L. CASPER, OF WEINER, ARKANSAS.

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1003874. L, ferr Specification of Letters Patent.

Application filed .Tuly 16, 1910.

Patented Sept. 19, 1911. serial No. 572,345.

To all whom it may concern:

Be it known that I, FRANK L. CASPER, a citizen of the United States,residing at Weiner, in the county of Poinsett, State of .y purposes, andhas for its object to provide l5 a pump that will have novel means foreffecting the discharge of the sand automatically.

A further object is to provide a pump of this character that will beprovided with a cut-off shell or sleeve that will be moved to itsoperative or released position without manual manipulation.

With these and other objects in view, the

.A invention consists of the novel details of construction andcombination of parts hereinafter fully described and claimed, it beingunderstood that various modifications may be made in the minor detailsof construction within the scope of the appended claims.

In the accompanying drawings forming part of this specification r-Figure1 is a side elevation of a pump constructed in accordance with myinvention shown in engagement with the clench hook and in position fordischarging sand. Fig. 2 is a side elevation of the pump. Fig. 3 is alongitudinal sectional view through the pump showing the cut-off sleevein released position. Fig. 4 is a detail perspective view 40 of theclench hook. Fig. 5 is a cross sectional view taken on the line 5 5,Fig.. 2.

The sand pump comprising the subjectmatterof this invention is designedto be supported by the usual derrick of an oil well or the like, thesupporting means being l a chain, cable, or similar device, this cableserving to simultaneously support the pump and actuatethepump piston aswill presently be explained.

Referring now to the drawing 10 designates a beam of the above mentionedderrick, and fixed to this beam 10 is a clench hook ll comprising acurved hooked extremity 12 from the outer edge of one side of whichprojects laterally a pair of spaced ears 13 which are equipped adjacenttheir extremities with openings 14 through which chains 15 are inserted,the free ends of these chains being secured to the beam 10 in anypreferred manner. A grab plate 16 is mounted upon the uppermost side ofthis clench hook, the grab plate comprising a flat piece of metal formedon one edge with an angular rabbet 17 adapted to coperate with the freeextremity of the hook in engaging and lifting the cut-off sleeve of thepump as will hereinafter be described, the opposite edge of this grabplate being equipped with a pair of ears 18 which overlie for a portionof their length the ears of the clench hook and are bolted to the latteras shown at 19. The pump when lifted from the well by the derrick cableruns freely through the grab hook, but when the lifting movement of thepump ceases after the pump has been lifted out of the well and the pumpis lowered slightly, the grab hook binds against the cut-ott' sleeve ofthe pump and holds the latter against movement so that as the pumpcylinder is lowered the sand and gravel are discharged through openingsin the cylinder as will hereinafter appear.

The pump is of such weight as to remain stationary at the bottom of thewell during lifting of the piston by the cable, the piston gravitatingupon slackening of the cable and forcing out the water taken in, asusual in pumps of this character. The pump comprises a pump cylinder 2Ohaving formed in its sides adjacent its lower end a pair of oblongopenings 21 which register with the bore of the cylinder, and furtherhaving peripheral threads on its extreme end which receives a metalcircular shoe 22, this shoe serving to clamp a fiexible packing collar23 to the outer' surface of the cylinder below the lateral openingstherein, rivets or similar fasteners 24 being passed through the shoeand packing collar and serving to effectively secure the same to thepump cylinder. This metal shoe rests upon the bottom of the well and isprovided with a lower sharpened edge 25 which penetrates and loosens thesand so that the same may rise into the bore of the pump cylinder.

Closing the bore of the pump cylinder at approximately the lowermostedges of the opening therein, is a flap valve 26, this flap valveopening as usual during the up stroke of the pump piston and permittingof sand and gravel and some water flowing into the bore of the pumpcylinder and closing` during the down stroke of the pump piston andpreventing` of the escape of the contents of the cylinder.

Mounted in the bore of the pump cylinder at the upper end/ thereof is asocket 27, this socket comprising a circular collar 28 having a pair ofspaced parallel legs 29 which are inserted in the bore of the pumpcylinder and conform snugly to the contour thereof. Bolts or similarconnectors 30 are passed through the pump cylinder and legs of thesocket and serve to secure the parts together, these bolts performing afurther function of limiting the upward movement of the cut-off sleevehereinafter described.

Slidingly fitted in the bore of the pump cylinder is a piston comprisinga hollow piston rod 31, this piston rod having riveted as shown at 32 orotherwise fixed to its outer periphery a collar 83, and being reducedbelow the collar, this reduced portion being threaded as shown at 34.Threaded on this reduced portion is a ring 35 and threaded on thereduced portion in rear of this ring is second ring 3G, a loose fiexiblesplit ring 37 being mounted upon the reduced portion intermediate theserings and retained in position by these rings. The loose split ring ispreferably formed of a helical length of spring material as shown andtogether with the retaining rings forms a head for t-he piston rod whichsnugly fits in the bore of the V pu'mp cylinder and prevents wabbling ofthe piston rod during its movement. The upper edge of the collar 33engages the socket 27 and limits the outward movement of the piston rod.

rllhe upper end of the piston rod is closed by a flap valve 38 whichopens during the down stroke of the piston rod and permits of the escapeof whatever water may have been drawn into the piston rod. During the upstroke of the piston rod the sand, gravel and a small quantity of waterwill be drawn into the pump cylinder, the water as above statedbeingvdischarged immediately through the flap valve at the upper end ofthe piston rod and the sand and gravel lodging in the bottom of thepiston rod. For attaching the pump to the derrick cable, a sleeve 39 isriveted or otherwise secured as shown at 40 to the upper end'of thepiston rod, this sleeve having approximately oblong openings 41 thatregister with the flap valve at the upper end of the piston rod.Arranged in the bore of the sleeve is a metal eye 42, this eye havingits terminals bolted as shown at 43 to the sleeve.

A check sleeve 44 as above stated, is slidingly fitted upon the pumpcylinder 20, this sleeve being equipped at its lower end with a pair ofbolts 45 which project into the lateral openings formed in the pumpcylinder and by engaging the upper edges of these openings, limit theupward movement of the sleeve. By removing these bolts, the sleeves maybe removed for repairs. A flexible packing ring 46 is riveted orotherwise secured in the bore of the sleeve and so tightly engages thepump cylinder as to prevent sand working out between the sleeve andcylinder. rlhis packing ring engages the bolts 30 and limits the upwardsliding movement of the sleeve.

The sleeve 44 is normally held with its lower edges in abutting contactwith the packing ring of the shoe so that the lower lateral outletopenings of the pump cylinder are closed when the pump is being loweredinto the well and during the actuation of the pump. 1When the pump israised from `the well, the sleeve passes freely through the clench hookabove describeduntil the upward movement of the pump is stopped and atthe beginning of the lowering movement of the pump the clench hook bindson the sleeve and prevents further movement of the sleeve. Any furtherlowering movement of the pump will only serve to lower the pump cylinderwhereby the pump cylinder slides downwardly through the sleeve, thusexposing the outlet openings so that sand, gravel and the like in thepump cylinder may be discharged. To release the clench hook the pump israised and passed freely through the hook until finally the hook dropsoff the lower end of the pump. It is evident that the operation of theclench hook is automatic and that no manual handling of the sleeve isnecessary during its operation.

That is claimed is l. A sand pump comprising a pump cylinder having avalve mounted in its bore and having an inlet opening in its side, asleeve mounted for longitudinal sliding movement on said cylinder andadapted to close the inlet opening therein, a stop arranged in the boreof the sleeve and engaging one edge of the inlet opening for limitingthe movement of said sleeve when exposing said inlet opening, and ahollow piston working in said cylinder and having a valve in its bore.

2. A sand pump comprising a pump cylinder having a valve in its bore andhaving a plurality of inlet openings in its sides, a sleeve mounted forlongitudinal sliding movement on said cylinder and adapted to close theinlet openings therein, stops arranged in the bore of the sleeve andengaging the edges of the inlet openings for limiting the movement ofsaid sleeve in one direction, an annular shoe fixed to one extremity ofsaid cylinder and limiting the movement In testimony whereof, I aiix mysignaof said sleeve in ttlhe oppsite directin, sid ture, in presence oftwo Witnesses.

shoe havin@ a, s arpene cuttnv e e or penetratingbinto the soil, and apibstongwork- FRANK L' CASPER' ing in said cylinder and having a valvein Witnesses:

its bore to permit of the escape of Water LEWIS HOGUE,

therefrom. CHAS. THOMPSON.

Conies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents. Washington, D. C.

